Team:LMU-Munich/Bacillus Introduction

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[[File:Bacillus introduction banner.resized WORDS.JPG|620px|link=]]
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[[File:Bacilluss Intro.png|100px|right]]
 
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+++ Visit our [[Team:LMU-Munich/Lab_Notebook/Protocols|Protocols page]] for details how to work with ''B. subtilis'' +++
 
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Normally ''E. coli'' is used as the general chassis in the iGEM competition. We are using ''B. subtilis'' as chassis for a few reasons. To outline this the differences between ''E. coli'' and ''B. subtilis'' will be shown. There are two major differences between ''B. subtilis'' and ''E. coli'' that are of interest to us:
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==''Bacillus subtilis'' - a new chassis for iGEM==
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====Introduction====
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{| width="100%" style="text-align:center;"|
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|<p align="justify">Introduction to ''B. subtilis'' and background information.</p>
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|[[File:Tabelle.png|right|150px|link=Team:LMU-Munich/Data/introintro]]
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! colspan="2" |[[File:LMU Arrow purple.png|40px|link=Team:LMU-Munich/Data/introintro]]
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1. ''B. subtilis'' is able to differentiate into cells with different morphology and function, the most severe form being the endospore which is formed under stress conditions. But there are also phenomena like cannibalism which makes ''B. subtilis'' a lot more diverse to work with. We will exploit the production of endospores in our project BEADzillus. The life cycle of ''B. subtilis'' is depicted in figure 1.
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There are two major differences between ''B. subtilis'' and ''E. coli'' that are of interest to us:
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<div class="box">
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====Transformation of ''B. subtilis''====
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{| width="100%" style="text-align:center;"|
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|<p align="justify">Cloning strategy for the work of '' B. subtilis''.</p>
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|[[File:Integration.png|right|150px|link=Team:LMU-Munich/Data/integration]]
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! colspan="2" |[[File:LMU Arrow purple.png|40px|link=Team:LMU-Munich/Data/integration]]
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2. ''B. subtilis'' can replicate exogenic DNA via an origin of replication on a plasmid as ''E. coli'' does, but there is a much more elegant way of bringing in exogenic DNA stretches. When flanked by homologous regions to the bacterial genome, it will integrate at high efficiency via homologous recombination at this loci and furthermore be replicated with the genome. This has the advantage that if comparing different things, not only the enviroment is always the same, but also the copy number is from cell to cell and from strain to strain the same, which is not always the case for replicative plasmids. This integrative way of bringing in exogenic DNA will be exploited by us when producing the BioBrick compatible Bacillus vectors. The comparision between these two ways of bringing in exogenic DNA  is depicted in figure 2.
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<div class="box">
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====Differentiation====
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For these reasons in some cases ''B. subtilis'' can be the chassis of choice. Sadely only very few teams have worked with this chassis and there is by time no established BioBrick system to use ''B. subtilis'' as a chassis.
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{| width="100%" style="text-align:center;"|
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|<p align="justify">The life cycle of ''B. subtilis'' and the different cell stages.</p>
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[[File:Figures Bacillus Intro fig1.png]]
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|[[File:Figures Bacillus Intro fig1.png|right|150px|link=Team:LMU-Munich/Data/differentiation]]
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Figure 1: The vegetative cycle is very similiar to the one of ''E. coli.'' But if there is a stress condition like starvation, the cells enter Sporulation, where they first undergo a polar cell division, followed by the formation of the Endospore. If the enviromental conditions are friendly again, the Spore will then germinate and reenter the vegetative cycle.
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[[File:Figures Bacillus Intro fig2.png]]
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Figure 2: Exogenic DNA is shown in red while the bacterial genome is black a) The propagation of exogenic DNA if brought in as replicative plasmid. The number of plasmids per cell can vary. b) The propagation of exogenic DNA if it is able to integrate into the genome via homologous recombination
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'''Project Navigation'''
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<a href="https://2012.igem.org/Team:LMU-Munich/Bacillus_Introduction">
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<img src="https://static.igem.org/mediawiki/2012/8/8d/Bacilluss_Intro.png" height=70"/>
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<a href="https://2012.igem.org/Team:LMU-Munich/Bacillus_Introduction"><font size="2" face="verdana">Bacillus Intro</font></a>
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<a href="https://2012.igem.org/Team:LMU-Munich/Bacillus_BioBricks">
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<img src="https://static.igem.org/mediawiki/2012/7/78/BacillusBioBrickBox.png" height=70"/>
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<a href="https://2012.igem.org/Team:LMU-Munich/Bacillus_BioBricks"><font size="2" face="verdana">Bacillus Intro</font></a>
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<a href="https://2012.igem.org/Team:LMU-Munich/Spore_Coat_Proteins">
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<img src="https://static.igem.org/mediawiki/2012/c/c1/SporeCoat.png" height=70"/>
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<a href="https://2012.igem.org/Team:LMU-Munich/Spore_Coat_Proteins"><font size="2" face="verdana">Bacillus Intro</font></a>
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<a href="https://2012.igem.org/Team:LMU-Munich/Germination_Stop">
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<img src="https://static.igem.org/mediawiki/2012/f/f6/GerminationSTOP.png" height=70"/>
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<a href="https://2012.igem.org/Team:LMU-Munich/Germination_Stop"><font size="2" face="verdana">Bacillus Intro</font></a>
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|[[File:Bacilluss Intro.png|100px]]
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|[[File:BacillusBioBrickBox.png|100px]]
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|[[File:Bacilluss Intro.png|100px]]
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|[[File:Bacilluss Intro.png|100px]]
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|Intro to ''B. subtilis''
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! colspan="2" |[[File:LMU Arrow purple.png|40px|link=Team:LMU-Munich/Data/differentiation]]
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|Bacillus BioBrickBOX
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|BEADzillus
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|GerminationSTOP
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<br>
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<div class="box">
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====Project Navigation====
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{| width="100%" align="center" style="text-align:center;"
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|[[File:Bacilluss_Intro.png|100px|link=Team:LMU-Munich/Bacillus_Introduction]]
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|[[File:BacillusBioBrickBox.png|100px|link=Team:LMU-Munich/Bacillus_BioBricks]]
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|[[File:SporeCoat.png|100px|link=Team:LMU-Munich/Spore_Coat_Proteins]]
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|[[File:GerminationSTOP.png|100px|link=Team:LMU-Munich/Germination_Stop]]
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|[[Team:LMU-Munich/Bacillus_Introduction|<font size="2">'''''Bacillus'''''<BR>Intro</font>]]
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|[[Team:LMU-Munich/Bacillus_BioBricks|<font size="2" face="verdana">'''''Bacillus'''''<BR>'''B'''io'''B'''rick'''B'''ox</font>]]
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|[[Team:LMU-Munich/Spore_Coat_Proteins|<font size="2" face="verdana">'''Sporo'''beads</font>]]
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|[[Team:LMU-Munich/Germination_Stop|<font size="2" face="verdana">'''Germination'''<BR>STOP</font>]]
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Latest revision as of 16:53, 26 October 2012

iGEM Ludwig-Maximilians-Universität München Beadzillus

Bacillus in urban culture.jpg

The LMU-Munich team is exuberantly happy about the great success at the World Championship Jamboree in Boston. Our project Beadzillus finished 4th and won the prize for the "Best Wiki" (with Slovenia) and "Best New Application Project".

IGEM HQ LMU prize.jpg

[ more news ]

Sporenfreunde

Retrieved from "http://2012.igem.org/Team:LMU-Munich/Bacillus_Introduction"